What is the function of the outflow valve in the CACS?

The outflow valve in the Cabin Atmosphere Control System (CACS) plays a critical role in regulating cabin pressure. Its primary function is to control the rate at which air exits the cabin, thereby maintaining the desired pressure level throughout the flight. As the aircraft ascends and descends, the outflow valve adjusts to allow the proper amount of air to escape, ensuring a stable and comfortable environment for passengers and crew. This regulation is essential for preventing pressure differentials that could affect the safety and comfort of those on board. By managing the outflow of air, the valve helps achieve and maintain the intended cabin altitude pressure, which is vital for oxygen availability and overall passenger well-being during the flight.